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Question

Assertion(A): Be(OH)2 dissolves in excess of NaOH.
Reason(R): Be(OH)2 is an amphoteric compound.


Read the above assertion and reason and choose the correct statement regarding it.


A
Both Assertion and Reason are true and Reason is the correct explanation of Assertion
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B
Both Assertion and Reason are true but Reason is not a correct explanation of Assertion
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C
Assertion is true but Reason is false
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D
Both Assertion and Reason are false
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Solution

The correct option is C Both Assertion and Reason are true but Reason is not a correct explanation of Assertion
Beryllium hydroxide reacts with excess NaOH to form sodium beryllate, which is water-soluble.
Be(OH)2+2NaOHNa2BeO2+2H2O
Beryllium hydroxide dissolves with acids as well as alkalies, so it is amphoteric in nature.

Hence, option ( B ) is correct.

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